scholarly journals Emissive Organogel Mediated Construction of Flexible Covalent Organic Polymer for the Separation of Aniline for Water Purification

2022 ◽  
Author(s):  
Apurba K. Das ◽  
Sayan Maiti ◽  
Tapas Ghosh ◽  
Arati Samal
Keyword(s):  
Water Purification ◽  
Condensation Reaction ◽  
Organic Polymer

A flexible covalent organic polymer (COP) has been successfully synthesized via dynamic covalent gel (DCG) formation through imine condensation reaction between 6-hydrazinonicotinic hydrazide hydrate and benzene-1,3,5-tricarboxaldehyde within 7 min under...

scholarly journals Emissive Organogel Mediated Construction of Flexible Covalent Organic Polymer for the Separation of Aniline for Water Purification

2021 ◽  
Author(s):  
Apurba K. Das ◽  
Sayan Maiti ◽  
Tapas Ghosh ◽  
Arati Samal
Keyword(s):  
Binary Mixtures ◽  
Water Purification ◽  
Building Block ◽  
Amorphous Polymer ◽  
Condensation Reaction ◽  
Green Emission ◽  
Ambient Condition ◽  
Organic Polymer ◽  
Aggregation Induced Emission ◽  
Dimethyl Acetamide

A flexible covalent organic polymer (COP) has been successfully synthesized via dynamic covalent gel (DCG) formation through imine condensation reaction between 6-hydrazinonicotinic hydrazide hydrate and benzene-1,3,5-tricarboxaldehyde within 7 min under ambient condition. An emissive organogel mediated protocol has been developed for the construction of amorphous polymer (COP), selectively in N,N-dimethyl acetamide (DMA). Interestingly, two non-emissive building block units without large π-conjugated structures have been engaged for the construction of green emissive COP-gel. The green emission of COP-gel is generated by the intermolecular H-bonding assisted aggregation induced emission phenomenon. The dried COP efficiently adsorbs aniline molecules into its cavities and separate them from binary mixtures of aniline/nitrobenzene and aniline/water, respectively.

scholarly journals Hydrazone connected stable luminescent covalent–organic polymer for ultrafast detection of nitro-explosives

RSC Advances ◽  
2021 ◽  
Vol 11 (62) ◽  
pp. 39270-39277
Author(s):  
Muhammad Asad ◽  
Ya-Jie Wang ◽  
Shan Wang ◽  
Qing-Guo Dong ◽  
Lin-Ke Li ◽  
...  
Keyword(s):  
Schiff Base ◽  
Condensation Reaction ◽  
High Sensitivity ◽  
Organic Polymer ◽  
Nitro Explosives ◽  
Ultrafast Detection

A novel H-COP was synthesized through Schiff-base condensation reaction, which shows high sensitivity (Ksv ∼ 106 M−1) and selectivity (μM level) towards nitro-explosives.

scholarly journals Cyclotetrabenzil-Based Porous Organic Polymers with High Carbon Dioxide Affinity

2021 ◽  
Author(s):  
Timur Ashirov ◽  
Maymounah Alrayyani ◽  
Kyung Seob Song ◽  
Ognjen Miljanic ◽  
Ali Coskun
Keyword(s):  
Carbon Dioxide ◽  
Condensation Reaction ◽  
Building Blocks ◽  
Organic Polymer ◽  
Bet Surface Area ◽  
Chloride Salt ◽  
Organic Polymers ◽  
High Carbon ◽  
Porous Organic Polymers ◽  
High Carbon Dioxide

Porous organic polymers (POPs) incorporating macrocyclic units have been investigated in recent years in an effort to transfer macrocycles’ intrinsic host-guest properties onto the porous networks to achieve complex separations. In this regard, highly interesting building blocks are presented by the family of cyclotetrabenzoin macrocycles with rigid, well-defined, electron-deficient cavities. This macrocycle shows high affinity towards linear guest molecules such as carbon dioxide, thus offering an ideal building block for the synthesis of CO2-philic POPs. Herein, we report the synthesis of a porous organic polymer through the condensation reaction between cyclotetrabenzil with 1,2,4,5-tetraaminobenzene under ionothermal conditions using the eutectic zinc chloride/sodium chloride/potassium chloride salt mixture at 250 oC. Notably, following the condensation reaction, the macrocycle favors 3D growth rather than 2D one while retaining the cavity. The resulting polymer, named 3D-mPOP, showed a highly microporous structure with the BET surface area of 1142 m2 g−1 and a high carbon dioxide affinity with a binding enthalpy of 39 kJ mol−1. Moreover, 3D-mPOP showed very high selectivity for carbon dioxide in carbon dioxide/methane and carbon dioxide /nitrogen mixtures.

A ferrocene-linked metal-covalent organic polymer as a peroxidase-enzyme mimic for dual channel detection of hydrogen peroxide

The Analyst ◽  
2021 ◽  
Author(s):  
Qiong Hu ◽  
Yishan Fang ◽  
Xiongtao Yu ◽  
Jianzhi Huang ◽  
Lishi Wang
Keyword(s):  
Hydrogen Peroxide ◽  
Condensation Reaction ◽  
Enzyme Mimic ◽  
Organic Polymer ◽  
Channel Detection ◽  
Dual Channel ◽  
Peroxidase Enzyme

A novel ferrocene-linked metal-covalent organic polymer (MCOP-NFC) was synthesized through the Claisen–Schmidt condensation reaction of 1,1′-diacetyl ferrocene and tris(4-formylphenyl)amine.

A triazine-based covalent organic polymer for efficient CO2 adsorption

2015 ◽  
Vol 51 (49) ◽  
pp. 10050-10053 ◽  
Author(s):  
Ruth Gomes ◽  
Piyali Bhanja ◽  
Asim Bhaumik
Keyword(s):  
Schiff Base ◽  
Surface Area ◽  
Co2 Adsorption ◽  
Condensation Reaction ◽  
Organic Polymer ◽  
Bet Surface Area ◽  
Uptake Capacity ◽  
Hexagonally Ordered

A new triazine functionalized hexagonally ordered covalent organic polymer (TRITER-1) with a high BET surface area (716 m2 g−1) has been synthesized via the Schiff-base condensation reaction between a triamine and terephthaldehyde. TRITER-1 shows an excellent CO2 uptake capacity of 58.9 wt% at 273 K and 5 bar pressure.

scholarly journals The impact of zeta potential changes on Ceratium hirundinella cell removal and the ability of cells to restore its natural surface charge during drinking water purification

RSC Advances ◽  
2017 ◽  
Vol 7 (36) ◽  
pp. 22433-22440 ◽  
Author(s):  
H. Ewerts ◽  
S. Barnard ◽  
A. Swanepoel
Keyword(s):  
Drinking Water ◽  
Zeta Potential ◽  
Surface Charge ◽  
Water Purification ◽  
Settling Time ◽  
Organic Polymer ◽  
Source Water ◽  
Ceratium Hirundinella ◽  
Drinking Water Purification ◽  
The Impact

The removal efficacy ofCeratiumcells from source water was evaluated. The best ZP for coagulation were achieved with organic polymer and Ca(OH)2. Cells were able to restore their ZP after 120 and 240 minutes settling time.

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